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According to information retrieved on December 15, 1994 from the files of the San Joaquin <br /> County Environmental Health Division, no known public or private water wells are operated by <br /> the City of Stockton, California Water Service Company, or private citizens, within 2,000 feet <br /> of the Village West Marina. The nearest well is approximately i mile east of the property at <br /> Interstate Highway 5 and Benjamin Holt Drive. Another is located at Alexandria Place and <br /> Meadow Avenue. Village West Marina receives publicly-supplied water. <br /> 6.0 CONCLUSIONS <br /> • Known soil contamination by gasoline analytes is believed confined to two, likely <br /> inaccessible portions of the backfilled UST overexcavation. Sampling on July 20, 1993 <br /> revealed that the concentration for TPH-g in soil exceeded 300 mg/Kg in the north wall <br /> and south-bottom samples; benzene was detected at 5.8 mg/Kg in the south-bottom <br /> sample. <br /> • Ground-water contamination by gasoline analytes cannot been fully defined in the <br /> northeastern part of the project area as indicated by analytical results of the HydropunchT"° <br /> sample collected from HP-9 on July 3, 1995. It is the opinion of W.W. Irwin, Inc. that <br /> insufficient surface space between HP-9 and the condominium structure would not allow <br /> for additional drilling there. HP-9 is downgradient of the only impacted monitoring well, <br /> MW-6. Eastside well MW-8, however, yielded nondetectable analytical results when <br /> sampled on July 7, 1995. <br /> • HP-3, which was drilled and sampled on the west side of the dike adjacent to the shore <br /> of Fourteen-Mile Slough, yielded an elevated TPH-g/benzene-impacted sample on April <br /> 8, 1994. The location of HP-3 is the approximate westernmost Iimit of the project area. <br /> • Definition has been obtained to the north, as demonstrated by nondetectable results of <br /> samples collected from HP-7/MW-7 on July 3 and 7, 1995. Definition on the south side <br /> has been demonstrated by consistent nondetectable results of ground-water samples <br /> collected from MW-4. <br /> 7.0 RECOA VIENDATIONS <br /> • Because the ground-water plume cannot be fully defined to the east because of the <br /> obstructing location of the condominium structure, W.W. Irwin, Inc. recommends no <br /> further drilling of monitoring wells at Village West Marina. Further drilling is not <br /> possible to the west of HP-3 (in Fourteen-Mile Slough). <br /> W W. Irwin,Inc. <br /> Project No. 33016.05&.06 <br /> August 1995 15 <br />